1387455 has 16 divisors (see below), whose sum is σ = 2350944. Its totient is φ = 696320.

The previous prime is 1387433. The next prime is 1387499. The reversal of 1387455 is 5547831.

It is not a de Polignac number, because 1387455 - 2⁷ = 1387327 is a prime.

1387455 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2466 + ... + 2975.

It is an arithmetic number, because the mean of its divisors is an integer number (146934).

2^1387455 is an apocalyptic number.

1387455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1387455 is a deficient number, since it is larger than the sum of its proper divisors (963489).

1387455 is a wasteful number, since it uses less digits than its factorization.

1387455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5466.

The product of its digits is 16800, while the sum is 33.

The square root of 1387455 is about 1177.9027973479. The cubic root of 1387455 is about 111.5337494274.

The spelling of 1387455 in words is "one million, three hundred eighty-seven thousand, four hundred fifty-five".